1. C. M. Lederer, V. S. Shirley (Eds), Table of Isotopes, 7th ed., 1978.
2. L. E. Peinendegen, K. Kasperek, 1st Intem Workshop on Trace Elements in Analytical Chemistry of Medical Biology, 1980, p. 1.
3. P. Schramel, Xu-li-Giany, Icp. Inf. News, 7 (1982) 429.
4. L. Meyerj, E. F. Angino, Invest. Urol., 14 (1977) 347.
5. A. Hesse, H. J. Schneider, W. Berg, Zentralbl. Pharm., 117 (1978) 753.